| 摘要 |
The invention relates to a self-blasting medium voltage circuit breaker. Its subject is a medium voltage circuit breaker comprising, inside a casing filled with dielectric gas, a cutoff chamber including a fixed main contact, a moving main contact, a fixed arc contact, a moving arc contact and a thermal volume, characterised in that it comprises means for ensuring a rise in pressure in the thermal volume V2 and allows straightforward blasting for currents of low and medium intensity and double blasting for currents of high intensity. Application to medium voltage circuit breakers. <IMAGE>
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